Proton Conductivity of SPEEK Membranes

Shashidhara, G. M.; Kumar, K. Naveen

doi:10.1080/03602551003749601

Cited by 20 publications

(10 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The values of the SPAEK glass transition temperature are reported in Figure 3 and compared to the T g values given in the literature for SPEEK of different IEC values. 11,32,33 A good agreement is observed between all the data, with a shift of T g toward higher temperatures with increasing IEC values. This trend is generally explained by increased intermolecular interactions by hydrogen bonding of SO 3 H groups and increased molecular bulkiness that hinder the internal rotations compared to unsulfonated PEEK.…”

Section: Resultssupporting

confidence: 71%

Influence of Chemical Structure on Hydration and Gas Transport Mechanisms of Sulfonated Poly(aryl ether ketone) Membranes

et al. 2012

View full text Add to dashboard Cite

This work reports the influence of the chemical structure of two sulfonated poly(aryl ether ketone)s (SPAEK) on the hydration and gas transport mechanism of thin membranes made thereupon. For this purpose, two sulfonated poly(aryl ether ketone)s having the same ionic exchange capacity (IEC) but bearing a different repartition of the sulfonic acid groups along the polymer backbone were prepared. These polymers were synthesized by direct copolymerization of two specific sulfonated precursors, bisphenol AF and 4,4'-difluorobenzophenone. The morphology of the membranes was studied by transmission electron microscopy, and the thermal properties of the ionomers were determined from differential scanning calorimetry and thermogravimetric analyses. A detailed analysis of the water sorption isotherms and kinetics was performed. The gas transport properties were also determined for He, H(2), and CO(2) in the full range of water activity. From the detailed analysis of the water sorption isotherm and of the relative contributions of the Fickian diffusion and relaxation phenomena, a water sorption mechanism was proposed in relation with the SPAEK architectures and polymers' chain mobility. This mechanism allowed explaining the different evolution of the gas transport properties observed as a function of the gas nature and hydration rate.

show abstract

Section: Resultssupporting

confidence: 71%

Influence of Chemical Structure on Hydration and Gas Transport Mechanisms of Sulfonated Poly(aryl ether ketone) Membranes

et al. 2012

View full text Add to dashboard Cite

show abstract

“…However, there is not a complete separation among them. The process that occur in each step of degradation for sPEEK . and sPEES are similar, therefore the DS for the sPEEK samples were determined using the second event.…”

Section: Resultsmentioning

confidence: 99%

Sulfonation of Poly(arylene Ethers) and ABA Triblock Copolymers With a Mild Sulfonation Agent

Agudelo

Palacio

López

2016

Macromolecular Symposia

View full text Add to dashboard Cite

Summary A series of sulfonated polymers from poly(ether ether ketone) (PEEK) and poly(ether ether sulfone) (PEES) were obtained using acetyl sulfate as mild sulfonating agent. The thermoplastic polymers PEEK and PEES were synthesized by polycondensation reactions and sulfonated by electrophilic substitutions of the most activated positions in the aromatic polymer structure. The sulfonation reaction was performed between 40 °C to 60 °C varying the reaction time from 3 h to 12 h to obtain different Degrees of Sulfonation (DS). The modification of these polymers was corroborated by spectroscopic techniques and the thermal properties were determined by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). Finally, ABA triblock copolymers, such as PMMA‐PEEK‐PMMA and PMMA‐PEES‐PMMA, were sulfonated under soft reactions conditions, and the modification of middle block of each copolymer was confirmed by different techniques.

show abstract

“…are promising high performance engineering thermoplastics owing to their excellent chemical, thermal, mechanical, thermooxidative, and hydrolytic stability [1][2][3][4][5][6][7][8]. They find their industrial applications in fuel cells, membrane, and other industries.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of copolysulfonate of 1,1′-bis(3-methyl-4-hydroxyphenyl)cyclohexane, bisphenol-A, and 4,4′-diphenyl disulfonyl chloride

Joshi

Parsania

2012

Designed Monomers and Polymers

View full text Add to dashboard Cite

Proton Conductivity of SPEEK Membranes

Cited by 20 publications

References 25 publications

Influence of Chemical Structure on Hydration and Gas Transport Mechanisms of Sulfonated Poly(aryl ether ketone) Membranes

Influence of Chemical Structure on Hydration and Gas Transport Mechanisms of Sulfonated Poly(aryl ether ketone) Membranes

Sulfonation of Poly(arylene Ethers) and ABA Triblock Copolymers With a Mild Sulfonation Agent

Synthesis and characterization of copolysulfonate of 1,1′-bis(3-methyl-4-hydroxyphenyl)cyclohexane, bisphenol-A, and 4,4′-diphenyl disulfonyl chloride

Contact Info

Product

Resources

About